Ionia Weather Forecast

    • 61
    • 81

    Rain Showers Likely

    • 54
    • 73

    Rain Showers Likely

    • 54
    • 67

    Rain Showers

    • 55
    • 73

    Partly Sunny

    • 60
    • 78

    Partly Sunny

    • 62
    • 81

    Chance Rain Showers

Today 22 Aug Ontario

Sunny. Highs Ranging from the mid 70s on the Hilltops to the lower 80s across the lower Elevations. South Winds around 10 Mph.

Tonight 22 Aug Ontario

Showers likely with a chance of Thunderstorms in the Evening, then Showers likely overnight. Lows in the lower 60s. South Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ionia Temperature Statistics

August Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 20 August, 2026

    57 °F

  • Average August

    72.4 °F

  • Highest 5 August, 2026

    87.7 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.6 °F
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